Matches 151 - 200 out of 376 < 1 2 3 4 5 6 7 8 >
Match Document Document Title
5917916 Audio reproduction systems  
Stereophonic sound reproduction apparatus comprising an input means (2) for producing binaural signals, cross-talk cancellation means, (10) loudspeaker means, (20, 22) headphone means, (26) and a...
5912975 Method and circuit for creating phantom sources using phase shifting circuitry  
In portable stereo radio receivers and television receivers, the loudspeakers therein may be separated only by a limited amount. This severely restricts the stereo image created by the...
5910990 Apparatus and method for automatic equalization of personal multi-channel audio system  
An apparatus for automatically equalizing a personal multi-channel audio system, and a method therefor, are disclosed. White noises which are generated by a transfer characteristic measuring...
5896456 Automatic stereophonic manipulation system and apparatus for image enhancement  
The manipulation system and apparatus receives electronic signals which are to be processed and recorded for playback as enhanced stereophonic audio signals from two laterally spaced loudspeakers...
5892830 Stereo enhancement system  
A stereo enhancement system processes the difference signal component generated from a pair of left and right input signals to create a broadened stereo image reproduced through a pair of speakers...
5892831 Method and circuit for creating an expanded stereo image using phase shifting circuitry  
In portable stereo radio receivers and television receivers, the loudspeakers therein may be separated only by a limited amount. This severely restricts the stereo image created by the...
5889867 Stereophonic Reformatter  
A method of creating an impression of sound from an imaginary source to a listener. The method includes the step of determining an acoustic matrix for an actual set of speakers at an actual...
5889843 Methods and systems for creating a spatial auditory environment in an audio conference system  
A method and a system for audio communication between a plurality of users at a plurality of sites utilizes a set of audio input sensors at each site. Each set of audio input sensors binaurally...
5890125 Method and apparatus for encoding and decoding multiple audio channels at low bit rates using adaptive selection of encoding method  
A split-band coding system combines multiple channels of input signals into various forms of composite signals and generates spatial-characteristic signals representing soundfield spatial...
5883962 Method and apparatus for spatially enhancing stereo and monophonic signals  
A method and apparatus is disclosed which spatially enhances stereo signals without sacrificing compatibility with monophonic receivers. In accordance with one embodiment of the present invention,...
5883961 Sound system  
A method of synthesizing a set of filters comprises locating first and second loudspeakers at first and second locations, respectively, coupling a first component of an audio program to the first...
5878145 Electronic circuit and process for creation of three-dimensional audio effects and corresponding sound recording  
Acoustic signals received by the ears are controlled by feeding back and filtering the signal to be applied to the speaker, rather than by use of a feedforward filter. The feedback filter may...
5872851 Dynamic stereophonic enchancement signal processing system  
A stereophonic signal processing system for enhancing the perception of sonic dimension and imaging in a sound reproduction system having at least two stereo speakers. The system provides a...
5850455 Discrete dynamic positioning of audio signals in a 360° environment  
A software algorithm is disclosed which allows audio signals to be positioned discretely and dynamically in a 360° environment, the center of which is assumed to be the position of the...
5844993 Surround signal processing apparatus  
A surround signal processing apparatus for reproducing surround sound through a pair of speakers arranged at front left and right positions with respect to a listener, based on a monaural rear...
5838800 Apparatus for enhancing stereo effect with central sound image maintenance circuit  
A system for enhancing the effect of stereo audio signals while maintaining the central audio image includes an expander circuit that tracks the monaural information that is common to both left and...
5835895 Infinite impulse response filter for 3D sound with tap delay line initialization  
An audio processing system is used to process digital audio signals that represent sound emanating from a source that is moving through three dimensional space. The audio processing system has a...
5822438 Sound-image position control apparatus  
To obtain a sound-broadened image and a clear sound-image discrimination image when producing plural kinds of sounds, the electronic musical instrument and the like provides a sound-image position...
5822437 Signal modification circuit  
A circuit is disclosed for modifying a first signal and a second signal from a signal source providing at least two signals. The circuit including devices for forming signal components from the...
5815578 Method and apparatus for canceling leakage from a speaker  
A system and method are disclosed for canceling the leakage from a speaker.
5812677 Acoustic signal processing method and apparatus  
Main voice processing is performed on an acoustic signal at a basic sampling frequency fs within one period of the basic sampling frequency fs to allow the main voice processing implemented...
5812672 Method for reducing data in the transmission and/or storage of digital signals of several dependent channels  
A method for reducing data during the transmission and/or storage of the digital signals of several dependent channels is described in which the dependence of the signals in the channels, e.g. in a...
5799094 Surround signal processing apparatus and video and audio signal reproducing apparatus  
A surround signal processor reproduces multi-channel audio signals with a pair of left and right rear surround signals via a pair of speakers arranged at front left and right positions roughly...
5796845 Sound field and sound image control apparatus and method  
The apparatus of the invention calculates filter coefficients for controlling sound field and sound image, based on a plurality of first impulse response signals and a pair of second impulse...
5768394 Surround audio signal reproducing apparatus having a sub-woofer signal mixing function  
A surround audio signal reproducing apparatus for reproducing a multi-channel audio signal to generate a surround sound effect is provided. The apparatus contains a surround decoder, a sub-woofer...
5764775 Audio processing unit for mixing L channel and R channel of CD/CD-1 audio signal  
Audio process units for controllably mixing L-channel and R-channel portions of a CD/CD-I audio signal each use a single attenuator (or digital multiplier) for developing L*G(LL), L*G(LR), R*G(RR)...
5761313 Circuit for improving the stereo image separation of a stereo signal  
By using special frequency response manipulation in the difference channel of a stereo signal, the stereo image will appear to extend beyond the actual placement of the loudspeakers. This is...
5748746 Ceiling speaker and signal source  
A system for controlling distribution of sound in a multi-channel sound system such as a "surround sound" system in a movie theater. Control signals are used to steer, or distribute, portions of...
5748745 Analog vector processor and method for producing a binaural signal  
An analog vector processor and method for converting right and left mono and stereo audio input signals through a series of six amplifier blocks and two control blocks using a series of unique...
5742687 Signal processing circuit including a signal combining circuit stereophonic audio reproduction system including the signal processing circuit and an audio-visual reproduction system including the stereophonic audio reproduction system  
A signal combining circuit has a first input and a second input for receiving signals which have frequencies in the audio frequency spectrum, and an output. A first signal path between the first...
5740253 Sterophonic sound field expansion device  
A stereophonic sound field generation device includes a left side localized reflected sound generation circuit which generates a left channel reflected sound signal and a left channel cancel signal...
5729612 Method and apparatus for measuring head-related transfer functions  
A method and apparatus is capable of accurately deriving acoustic transfer functions such as head-related transfer functions (HRTF) at low cost. Various aspects of the invention include...
5727067 Sound field control device  
A sound field control device includes a surround decoder for decoding an input surround encode signal and generating three channel signals of L, C and R to be reproduced in front left, front center...
5727066 Sound Reproduction systems  
A stereophonic sound reproduction system is aimed at synthesizing at a multiplicity of points (L) in the listening space. An auditory effect obtaining at corresponding points (K) in the recording...
5724429 System and method for enhancing the spatial effect of sound produced by a sound system  
System and method for enhancing the spatial effect of sound produced by a sound system. In an exemplary embodiment, the system includes a reverberator and a sound spatialization unit, which are a...
5717763 Vocal mix circuit  
A vocal mix circuit shifts the phase of a mixed audio signal using a phase shifter, and achieves a mixed signal emphasizing the voice components thereof, by subtracting a signal which is not...
5710818 Apparatus for expanding and controlling sound fields  
As in a compartment of an automotive vehicle, when a left- and a right-channel loudspeakers are disposed at angularly different positions from each other with respect to a frontward direction of a...
5708718 Surround sound processor system  
A surround sound processor system includes an in-phase decoder circuit, an out-of-phase decoder circuit, and a plurality of audio amplifiers. In a wireless embodiment, the surround sound processor...
5703999 Process for reducing data in the transmission and/or storage of digital signals from several interdependent channels  
A process for reducing data in the transmission and/or storage of digital signals of several interdependent channels is described. As the signals from the channels are not independent of one...
5703955 Method and apparatus for multichannel sound reproduction  
A multichannel sound reproduction method and apparatus are described for achieving a higher proportion in the overall room size for acoustic/visual use, which can be used for the...
5701344 Audio processing apparatus  
An audio processing apparatus is arranged to be capable of attenuating only an unnecessary wind noise without cutting off the low frequency part of sounds picked up. In the apparatus, a first low...
5692051 Electronic equalization for recessed loudspeaker mounting  
An equalizing circuit, for compensating frequency response perturbations in a loudspeaker caused by a recessed mounting of the loudspeaker, includes an input for receiving an audio signal, a...
5682433 Audio signal processor for simulating the notional sound source  
An Audio Signal Processing system in which gain values are calculated for a plurality of output channels so that, from a notional listening position, a notional sound source may be perceived as...
5677957 Audio circuit producing enhanced ambience  
A circuit for use in connection with a stereo audio system to increase the ambience includes a differencing circuit for receiving a left stereo input and a right stereo input. The differencing...
5671287 Stereophonic signal processor  
A frequency-dependent linear audio signal processor takes source signals S in input signals and provide directionally spread directionally encoded output signals. The processor directionally...
5666425 Plural-channel sound processing  
An artificial head (2) and a plurality of discrete monophonic microphones (8, 10, 12) are used to record one or more sound sources. The signals (14, 16, 18) from each of the microphones (8, 10, 12)...
5666422 Remote speaker for surround-sound applications  
A surround-sound system for use with conventional TV sets, using a wireless remote bipolar rear speaker (or two conventional speakers fed out of phase) for the surround (difference) channels. The...
5657391 Sound image enhancement apparatus  
A sound image enhancement apparatus for reproducing two-channel stereo signals with speakers, includes for each channel a first phase shifter and a second phase shifter for introducing different...
5642424 Device for connecting external sound generator  
A device for connecting an external sound generator having a plug and being incorporated in an apparatus having a circuit outputting an electrical sound signal. The external sound generator is, for...
5642422 Digital surround sound method and apparatus  
Method and apparatus for implementing surround sound in an audio system having a number of audio output devices, and audio output buffers associated with the audio output devices adapted to output...
Matches 151 - 200 out of 376 < 1 2 3 4 5 6 7 8 >